Final answer:
The sentence 'Yo vengo con ella' contains an irregular verb.
Step-by-step explanation:
The sentence that contains an irregular verb is Yo vengo con ella.
In this sentence, the verb 'venir' (to come) is conjugated in the first person singular form 'vengo'. This verb follows an irregular conjugation pattern, as it does not follow the regular '-er' verb endings.
Other examples of irregular verbs in Spanish include 'ser' (to be), 'ir' (to go), and 'tener' (to have), among others.
Learn more about Irregular verbs in Spanish